Crank-casing for internal-combustion engines.



I F f C. WEISS.

CRANK CASING FOR INTERNAL comausnow ENGINES.

APPLICATION FILED JUNE I. 1916- Patented Jan, 14,1919.

2 SHEETS-SHEEI I- INVENTOR.

C. W. WEISS.

CRANK CASING FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JUNE I. 1916.

Patented Jam. 14', 1919 2 SHEETS-SHEET}.

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GARL W. WEISS, OF BROOKLYN, NEW YORK? CRANK-CASING FOR INTERNAL-COEBUSTIQN ENGINES.

earers.

Specification of Letters Patent.

Application flied June 1, 1916. lanai No. 101,131.

To all whom it may concern:

Be it known that I Cant. W. Wines, a citizen of the United. tates, and a resident of the borough of Brookl of the city of New York, in the State New York, have invented certain new and useful Improvements in Crank-Gasings for Internal- Combastion Engines, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

This invention relatesgenerally to crank casings for internal combustion engines and has for its general objects to improve the construction of such crank casings by afi'ording eater accessibility to the bearings, per- ,mittmg the removal of the crank shaft through the side wall of the crank casing, increasing the rigidit of the entire engine and decreasing both t e initial cost and the cost of repair for engines embodying the invention. More particularly, the invention is concerned with two cycle internal combustion engines of the crank-case compression type. .As heretofore known, such en'- gines have been constructed of two sections meeting along the line of the bearings for the crank shaft and bolted together, so that access to the bearings for inspection or removal could only be efiected by separating the two sections of the engine. The skill required in such separation and the expense.

in time and labor are well known to those skilled in the 'art.

In the preferred embodiment of the present invention removable plates in the side walls of the crank-case carry sections of the hearings for the crank shaft so that the removal of the plates involves a removal of a ortion of each bearing and exposes the ot or section of-the corresponding bearing to free inspection. The invention further contemplates the provision of relatively light, hollow bearing caps'of such form as to permit the temperature of the bearing surface to be determined by the hand. Other objects of the invention will appear hereinafter in connection with the description of the accompanying drawings, in., which Figure 1 is a view in end elevation of an internal combustion engine having a crank case formed in accordance with the present invention. 7 v

Fig. 2 is a fragmentaryview inside elevation of theengine shown JlII FigCIl.

Fig. 3 is a detail view in" section taken through one of the improved removable bearing caps.

Flg. IS a view in elevation of the cap shownin Fig. 3. Flg 5 is a view of the engine in front elevation, with the removable plates of the casing removed.

Fig. 6 is a view in transverse section through the casing,'showing one of the removable caps withdrawn from. its operative position.

Fig. is a top view of the removable cap shown in Fig. 6.

As this description proceeds, it will be evldent that the invention, in its broad aspect, will be adapted for application to in- Patented Jan. 14, 1919.

cured to the crank case b as by bolts 0 in the usual manner andthe crank case will have formed therein suitablebearings b for the crank shaft d. In an engineof the crank case comfpression type, the compression chamber oreach cylinder must be separated from the other chambers by asubstantially gas tight partition, indicated as formed of plates 6, in Fig.2. The hearings in such separating walls e must also be substantially gas tight in order that the operations of the engine may be carried on in the intended manner, as will be understood.

In accordance with the present invention, the bearings of the crank shaft 0! are formed of two sections, one of which 6 is formed in the stationary end plates and partitions of the crank case, and the other of which I) is formed as a removable cap of such shape and dimensions as to supplement the al'with a, plate I), the

" erably forrnnid inte outer surfaceof which-is adapted to lie flush with the outer surface of the side wall of the crankcase b when the cap-is properly.

positioned; The cap 6 is formed" hollow so as to! constitute a hollow wall in which when the engine is in use. as is evidently highly desirable. The wall of the cap b is of'such shape and dimensions as to engage snugly the proximate edges of the walls and partitions of the crank case along the openings formed to receive the caps. For instance, as shown in Fig. 2, the cap for the center partition 0 between the chambers of the two cylinders, is substantially rectangular in outline and its upper and lower walls lie snugly against the edgesof the partitions e to form a gas tight union therewith and thereby hold the compression in the two chambers. The cap itself embraces the crank shaft (Z and cooperates with the other section b of the bearing in such a manner as to maintain the same gas tight separation of the two chambers. The other bearing caps at the ends of the crank case may be of slightly diflerent form to conform to the lines of the crank case itself, but such caps are, structurally, identical with the cap used for the center bearing. The exposed side walls of the end caps may serve as portions of the end walls of the crank case while the exposed faces of the plates 6 will maintain the continuity of the exposed surface of the side walls of the crank case. Between the removable caps b in the side wall of the crank case b are left manholes which may be covered, when the caps are in position, by suitable plates 7 which are preferably of such form and dimensions as to lap over the edges of the caps in such manner as to permit the use of common securing bolts 9 for the cover plates and the caps. In this connection, it is of importance to note the desirable construction indicated in Fig. l for insuring a firm gas tight union between the plates 6 and the wall of the crank case without sacrificing that rigidity which is essential. The side wall of the crank case upon its outer surface is channeled, as at 6*, to provide shouldered grooves to receive in snug locking engagement corresponding shouldered bosses 72 formed on the rear face of the removable plates 12 As stated hereinbefore, when the plates are in position, the Outer surfaces thereof lie flush with the outer surface of the wall of the crank case.

The continuous opening in the side wall a of the crank case b is of sufficient width to permit the bodily movement therethrough of the crank shaft d. Accordingly, in assembling the parts, with the cover plates f and bearing caps b removed, the crank shaft may be inserted laterally through the side wall of the crank case and placed in position in the stationary walls of the crank case. The bearing caps 19 may then be placed in position to supplement completely the other portions 12 of'the bearings and complete the transverse walls in the crank case. When the bearing caps are properly positioned, the bosses b will rest Within the shouldered grooves 71 and the outer faces of the plates will lie flush with the outer surface of the wall of the crank case. The caps will be held in position by means of bolts h which pass therethrough into the wall of the crank case b. The manholes remaining may then be closed by securing the cover plates f in position. In securing these cover plates, common bolts 9 may be used which will pass through themand throu h the plates 6 of the bearing caps 6 Tie edges of these cover plates f will overlap the edges of the plates 6 and the edges of the openings in the wall of the crank case, so as to close this crank case Completely. With the parts thus positioned, it will be evident that the rigidity of the engine has been enhanced rather than lessened by the provision of the removable bearing caps, since these caps constitute the only removable elements and the other portions 1) of the bearings and the transverse walls in the crank case may both be formed in the most advantageous manner. Again, the intimate union between the bearing caps and their plates 1) with the proximate sections of the crank case serves to insure additional rigidity and to absorb entirely all lateral thrust imposed upon the bearing caps of the crank shaft. The openings in the hollow walls of the cap serve to permit ready determination of the condition of the bearings. Such removal may be followed by replacement of the cap or by ready inspection of the other portion 6 of the bearings as well as of the crank shaft. If desirable, the cover plates f and all of the bearing caps b may be removed and the crank shaft d then displaced laterally from the portions 6 of the earings and removed bodily through the side wall of the crank case.

While the illustrated embodiment has been described with some particularity, it is to be understood that the invention is not to be limited in its application to any particulartype of engine nor to the precise form or disposition of the elements, as disclosed. The scope of the invention will appear from the appended claims.

I claim as my invention:

' 1. In an internal combustion engine having a crank case and a crank shaft, :1 continuous opening in the side and end wall of the case extending from the shaft through which the crank shaft may be passed, sectional bearings for the shaft, plates detachably secured over said openings, bearing caps formed with said plates and constituting one section of the bearing, and independent cover plates detachably secured to the crank case with the first named plates to close the opening completely.

2. In a multi-cylinder twocycle crank case compression internal combustion engine having a crank shaft, a continuous opening in the sioie Well and end walls of each crank chamber, sectional bearings for the shaft, plates having inwardly extending Wells detechebly secured in the opening in each end win-0r each crank chamber to providle gas tight end Walls for each chamber, beerlng oeps formed with each of said plates end constituting one section of the hearing to cooperate with the portion of the bearing in the enoi well of each chamber, and. plates 10 to close the opening in the siote Well of the crank case. v

This specification signed this 26th dley of Mey, A D1916. r

O t 1'1; W. WEISS. 

